"Like any exercise, it's important to make sure you are actually working the muscles you intend to and not just going through the motions. Engaging your pelvic floor easy to do. Just think of what muscles you use to stop the flow of urine. It's essentially a kegel, but paired up with more movement," says Katie Dunlop, certified personal trainer (NCCPT), group fitness instructor, and owner of Love Sweat Fitness. Doing a plank pose is great for engaging your core with a direct focus, so you'll have more strength in holding yourself up and lasting longer in the bed. "On your hands or forearms, holding a Plank Pose is one of the best exercises you can do to build endurance and stamina," she says. "You'll get the benefit of stronger, more intense sex while strengthening your entire body," she says.